Dehiscence
a gaping, an opening, of the cells of anthers for the discharge a yawning. The opening of capsules and of their contents . This takes place either by clefts, by hinges, or by pores. When the anther-lobes are erect, the cleft takes place lengthwise along the line of the suture, constituting longitudinal dehis- At other times the slit takes place in a horizontal manner, from the connective to the side, as in Alchemilla arvensis and in Lemna, where the dehiscence is transverse.
When the dehiscence cence takes place by the ventral and , as in the legume of the pea and bean, it is called sutural. When composed of several united carpels, the valves may separate through the disthat the fruit will be resolved into its solved into its original carpels, as rhodocolchicum, etc. This dehiscence, in consequence of taking place through the lamellæ of the septum, is called septidehiscence is where the union between the edges of the carpels is persistent, and they dehisce by the dorsal suture, or through the back of the loculaments, as in the lily and iris. Sometimes the fruit opens by the dorsal suture, and at the same time the valves or walls of separate from the septa, leavtura. This is called septifragal dehising them attached ing them attached to the center, as in dathe center, as in dacence, and may be looked upon as a modification of the loculicidal.
DEHRA DOON (dā'ra), a beautiful and fertile valley in the Meerut division stan, at the S. W. base of the lowest and of the Northwestern Provinces, Hindubounded on the N. by the Jumna, N. E. outermost ridge of the Himalaya. It is to 8,000 feet high, S. E. by the Ganges, by the mountains of Gurwhal, from 7,000 S. W. by the Sewalik range, 3,000 to 3,500 feet high. Its length from S. E. to N. W. is about 45 miles; breadth, from valley is Dehra. 15 to 20 miles. The chief town in the growing wild in the marshy districts of